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Polluted by sewage 64 times in 2024 lasting 395 hours
So far this year (as of Apr 30, 2025, 9:30 AM) there has been 73 hours of sewage overflows
Your local MP is Josh Dean (Labour) - Find out more about their interests, donors, and voting at They Work For You
We get information about overflowing CSOs since January 2025. Here is a chart of the last three months of data for Hertford and Stortford, here you can see overflows in red, the darker the red, the more the CSO overflowed that day.
Each CSO has a row, the most recent data is on the right hand side.
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Donate NowHere are all the reported sewage overflow totals for Hertford and Stortford in 2024. Sometimes sewage can be being dumped for months at a time.
Reporting refers to how much of the time the monitoring was active. In this constituency all the declared CSOs appeared to have monitoring enabled for more than 50% of the year
| Company | Waterway | Site | Sewage Dumps | Duration (Hours) | Reporting % |
|---|---|---|---|---|---|
| Thames Water | River Ash | Hadham Mill | 35 | 220 | 84.7 |
| Thames Water | Stort Navigation | BISHOP'S STORTFORD MAIN SPS | 12 | 101 | 99.8 |
| Thames Water | River Ash | WIDFORD AND WARESIDE WWTW | 10 | 55 | 100 |
| Thames Water | High Wych Ditch | Bakers Farm, High Wych | 7 | 19 | 100 |
EDM (Event Duration Monitoring) data and Consented Discharges to Controlled Waters with Conditions from Environment Agency & Data Map Wales, and Scottish Water
Experimental derived data from Thames Water API, Some data may be missing or inaccurate. This uses Environment Agency rainfall data from the real-time data API (Beta) - Rainfall data is delayed by up to two days.
This website is intended to provide an accurate representation of the Environment Agency data. The data is hard to use, and thus some errors may have been made. If you find something that is incorrect, please raise an issue at the GitHub issues page and we'll endeavour to fix it quickly.
This project is not associated, approved or endorsed by any of the companies whose logos you see here.
Get in touch if you have queries or want to discuss our data.
press [at] top-of-the-poops.org